The half-life T of a radioactive element is that period in which _ of the atoms decay.
Correct answer: C. Half
- A. Nine times
- B. Double
- C. Half
- D. 4 times
- E. 7 times
Explanation
The half-life of a radioactive isotope is the amount of time it takes for one half of the radioactive isotope to decay.So the correct option is C.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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